EP0478441B1 - Verfahren und Vorrichtung zur Herstellung einer Strassenbelagschicht - Google Patents

Verfahren und Vorrichtung zur Herstellung einer Strassenbelagschicht Download PDF

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Publication number
EP0478441B1
EP0478441B1 EP91402538A EP91402538A EP0478441B1 EP 0478441 B1 EP0478441 B1 EP 0478441B1 EP 91402538 A EP91402538 A EP 91402538A EP 91402538 A EP91402538 A EP 91402538A EP 0478441 B1 EP0478441 B1 EP 0478441B1
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EP
European Patent Office
Prior art keywords
layer
binder
liquid
intended
substrate
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Expired - Lifetime
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EP91402538A
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English (en)
French (fr)
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EP0478441A1 (de
Inventor
Pierre Bense
Jean François Patte
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SCREG Routes et Travaux Publics
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SCREG Routes et Travaux Publics
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    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/12—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for distributing granular or liquid materials
    • E01C19/21—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for distributing granular or liquid materials for simultaneously but separately applying liquid material and granular or pulverulent material, e.g. bitumen and grit, with or without spreading ; for filling grooves and gritting the filling
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/46—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for preparing and placing the materials, e.g. slurry seals
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/48—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for laying-down the materials and consolidating them, or finishing the surface, e.g. slip forms therefor, forming kerbs or gutters in a continuous operation in situ
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/12—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for distributing granular or liquid materials
    • E01C19/20—Apparatus for distributing, e.g. spreading, granular or pulverulent materials, e.g. sand, gravel, salt, dry binders
    • E01C2019/2055—Details not otherwise provided for
    • E01C2019/207—Feeding the distribution means
    • E01C2019/2075—Feeding the distribution means with longitudinal conveyor belt

Definitions

  • the invention relates to a method for producing a layer of a roadway by depositing and compacting a composite material consisting of a filler such as aggregates and a binder, in the compactable state, on a support which can be consisting of a lower layer of the roadway previously made.
  • Road pavements generally consist of a succession of superimposed layers which are produced continuously by machines moving around the site. These different successive layers have different functions which are necessary to obtain the desired characteristics of the road surface.
  • Road pavements are very often made up of three layers of which the first, or foundation layer, is deposited on the ground, whose second, or base layer, rests on the foundation layer and whose third, or coating layer, covers the base layer.
  • a composite material consisting of a filler such as aggregates and a binder which may be in liquid form or constituted by a solid to which a liquid such as de the water.
  • binder Depending on the nature of the binder, a distinction is made in road construction, the so-called “black” techniques which use bitumen as a binder and the so-called “white” techniques which use as cement binder or, more generally, a hydraulic binder which can be substituted for cement and which can consist, for example, of fly ash, slag or pozzolan.
  • bitumen in the case of "black” techniques, can be mixed with the load incorporating the aggregates in the form of an emulsion (so-called cold techniques) or in the molten state (so-called hot techniques).
  • Also known from FR-A-2,611,766 is a device for carrying out the spreading of a bituminous binder in the form of an emulsion constituting a bonding layer and on the bonding layer, just after its spreading, a layer hot bituminous mixes.
  • EP-A-0.215.139 describes a method for renovating a road surface which consists in heating and then breaking up a bituminous surface layer of the road to obtain particles which are mixed with additives and spread and compacted on the road surface.
  • the superimposed layers of the roadway undergo the same types of stress, when passing vehicles; consequently, these layers undergo deterioration, in particular by fatigue, which are identical.
  • a perfectly bonded monolithic block therefore has a much longer lifespan than a laminated assembly whose layers are imperfectly bonded.
  • the durability of the pavement largely depends on the fatigue strength of the lower part or bottom of each of the layers which is subjected to the greatest tensile stresses.
  • the fatigue strength of a composite material comprising grains and a binder increases with the number of resistant bonds between the grains provided by the binder.
  • the endurance of the material therefore increases with the content of binder and with the number of surfaces in contact in the composite material. It therefore seems desirable to increase the amount of binder in the material and to decrease the number of holes between the grains, that is to say to increase the compactness of the binder-aggregate mixture, in the case of a material. composite for road construction.
  • the enrichment layer includes aggregates and a binder dosed at more than 800 g / m2.
  • This process which makes it possible to enrich by binding the bottom of the deposited layer ensures a significant improvement in the resistance to fatigue and the durability of the road surface.
  • this process requires for its implementation the application of an additional layer on the support and does not allow perfect control of the adjustment of the binder content in the bottom of the deposited layer.
  • this method does not make it possible to very significantly increase the compactibility of the bottom of the deposited layer, over a sufficient thickness.
  • the object of the invention is therefore to propose a process for producing a layer of a road pavement, by depositing and compacting a material composed of a filler such as aggregates and a binder, in the compactable state, on a support which may consist of a lower layer of the pavement previously produced, this method making it possible to appreciably increase the durability of the pavement, while being of a simple implementation requiring no substantial modification of the process of the layers of the roadway and of the materials used for this realization.
  • a first liquid is mixed with a fraction of the composite material intended to constitute a lower part of the layer deposited on the support, before its compaction, this first liquid being capable of increasing the compactness of the binder-aggregate mixture.
  • an additional quantity of binder is also mixed with the fraction of the material intended to constitute the lower part of the layer deposited on the support, before its compaction.
  • the invention also relates to devices making it possible to implement the method according to the invention, both during the production of road pavement layers by a technique using bituminous products and in the context of the use of 'a technique using hydraulic binders.
  • Figure 1 is a schematic elevational view in partial section of a device for producing a layer of a roadway from bituminous coated materials.
  • Figure 2 is a schematic elevational view in partial section of a device for producing a road pavement layer from a composite material containing a hydraulic binder.
  • FIG. 1 we see a mobile installation making it possible to continuously produce, on a road construction site, a layer of a road pavement constituted by bituminous materials.
  • bituminous materials constituted by mineral particles such as aggregates, sand and powdery material mixed with a viscous and sticky bituminous binder.
  • the bituminous binder can consist of pure hot melted bitumen which ensures the coating of previously dried and heated particles.
  • the corresponding techniques are designated as hot techniques.
  • bituminous binder ensuring the coating of the particles can also consist of bitumen dissolved in a solvent or dispersed in water in the form of an emulsion.
  • the corresponding techniques are designated as cold techniques.
  • the various superposed layers constituting the roadway can be bonded together by bonding layers produced by spraying a thin layer of bitumen emulsion on the support on which bituminous materials are deposited and compacted.
  • the emulsion layer is generally spread on the support by means of a spreader independent of the asphalt spreading and compacting machine.
  • Bituminous materials are spread over the bonding layer in the form of a layer having a constant thickness of between 8 and 16 cm. This layer of materials is compacted by vibrating and / or pneumatic compactors.
  • the lower part of this layer or base which comes into contact with the support is always less well compacted than the upper part or above the layer, which is unfavorable, in order to obtain satisfactory fatigue resistance of the layer, the lower part of which undergoes the greatest tensile forces, has the lowest compactness.
  • the thickness difference between the top and the bottom of the layer is greater the thicker the layer.
  • the mix has a constant composition, so that the bituminous binder content of the deposited layer is constant from the top to the bottom of the layer.
  • the weakening of the bottom of the layer due to its lower compactness is therefore not compensated for by a gradient of the binder content.
  • the device represented in FIG. 1 is constituted by a mobile machine moving on a support 1, in the direction of advancement of the site symbolized by the arrow 2, by means of tracks such as 3 supporting a chassis not shown.
  • the machine comprises at its front part a device for receiving coated materials or means for preparing cold coated materials which make it possible to continuously feed a conveyor belt 4 ensuring the transfer of bituminous coated materials 5, towards the rear of the chassis of the mobile machine.
  • the coated materials 5 are poured onto a lateral distribution screw 6 fixed to the rear part of the chassis.
  • the screw 6 has a transverse arrangement relative to the machine and makes it possible to distribute the materials 5 over the entire width of the roadway.
  • a finisher table 7, of known type, suspended by arms at the rear of the chassis makes it possible to adjust, smooth and compact the asphalt layer 5 deposited and spread on the support 1, at the rear of the distribution screw 6.
  • a compactor 10 moves behind the mobile machine so as to complete the compaction of the layer 8 of coated materials deposited on the support 1.
  • the level of coated materials 5 at the front of the distribution screw 6 is adjusted by means of a movable deflector 11 comprising an inclined surface delimiting the external surface of the mass of coated materials 5 distributed in the transverse direction by the screw 6.
  • L the inclination of the deflector 11 can be adjusted as a function of the angle of the slope naturally formed by the materials 5 poured onto the support.
  • the deflector 11 makes it possible to adjust the flow of the materials 5 in the direction of the kneading device and to avoid a segregation of the aggregates by size, by ensuring a certain retention of the aggregates of large size.
  • a kneading screw 12 of transverse direction linked to the chassis of the machine is disposed at the front and below the deflector 11, so that a fraction of the coated materials 5 spread at the front of the screw 6 comes in contact with the kneading screw 12. This fraction of the coated materials 5 constitutes the lower part 8a or bottom of the layer 8 coming into contact with the support 1.
  • a liquid spreading ramp 14 fixed transversely to the chassis at the front of the mixing screw 12 makes it possible to spray liquid bituminous binder, for example constituted by an aqueous emulsion, on the screw 12 and on the coated materials 5 intended to constitute the bottom 8a of the layer 8.
  • liquid bituminous binder for example constituted by an aqueous emulsion
  • the kneading screw 12 has blades of radial direction making it possible to achieve a significant shearing of the materials coated with the layer 8a and effective kneading of these materials with the liquid bituminous binder poured out by the spreading ramp 14.
  • a flow separator making it possible to direct a portion of the materials to a mixer placed at the front of the screw 6 in which bituminous emulsion is incorporated into this fraction of the materials intended to constitute the bottom of layer 8a.
  • the flow separator ensures the distribution of the materials between the front and the rear of the screw 6.
  • the materials intended to constitute the bottom of the layer are then treated completely separately from the materials intended to constitute the rest of the layer 8.
  • a second liquid spreading ramp 15 is arranged between the rear part of the tracks 3 of the finisher and the kneading screw 12.
  • the ramp 15 makes it possible to spread a layer of bituminous binder which can be constituted by an emulsion on the support 1, before depositing the coated materials 5.
  • the device which has just been described makes it possible to incorporate into the fraction of coated materials intended to constitute the bottom of layer 8a, a regulated quantity of liquid containing bituminous binder.
  • the additional quantity of binder introduced into the coated materials constituting the base layer 8a improves the mechanical properties and in particular the resistance to fatigue of this base layer.
  • the fatigue resistance and therefore the durability of the layer 8 are therefore significantly improved compared to a layer produced according to a conventional process resulting in a constant binder content throughout the thickness of the layer and a reduced compactness in the part. lower layer.
  • the bonding layer achieves a particularly effective bonding, in the case where the coated materials 5 are hot coated materials which are spread on the bituminous emulsion at a temperature of the order of 120 to 150 ° C.
  • the evaporation of water from the emulsion under the layer of hot mixes, in contact with the support 1, makes it possible to improve the penetration of the bitumen of the bonding layer and the bonding of the layer 8.
  • the following process the invention makes it possible to produce a layer of a road pavement having increased durability, whether this layer constitutes a base or seat layer of a pavement deposited and compacted on a foundation layer or a coating layer deposited and compacted on the base layer of the pavement or a foundation layer.
  • a road pavement made of bituminous materials and produced by the method of the invention may include a base layer of gravel-bitumen with a thickness of 12 cm on which is deposited a base layer of gravel-bitumen 12 cm thick glued to the foundation layer with a bituminous bonding layer.
  • a coating layer 8 cm thick is deposited on the base layer with the interposition of a bituminous bonding layer.
  • bitumen content in the foundation layer and in the base layer is around 4% and the bitumen content in the coating layer is 6%.
  • the compactness rate decreases very substantially throughout the thickness of the layer; the compactness is likely to show a decrease of 5% between the top and the bottom of the layer.
  • the method according to the invention makes it possible to increase the compactibility of the bottom of the layer and to obtain, in the pavement layer, a compactness which is substantially constant over the entire thickness of the layer and close to 95%.
  • the method according to the invention also makes it possible to increase the bitumen content in the lower part of the road layer.
  • This lower part can have a thickness of between 20 and 50% of the total thickness of the layer and the bitumen content of this lower part can be increased from 0.5 to 2%.
  • the layer 8 can be constituted by the covering layer, by the base layer of the roadway, or by the foundation layer, the support consisting respectively of the base layer, the foundation layer or a form layer.
  • FIG 2 there is shown a device for making a layer of a roadway by a technique using a composite material containing a hydraulic binder.
  • the mineral particles constituted for example by aggregates and sand are linked together by a crystal lattice formed in situ by hydration of a hydraulic binder or based on pozzolan.
  • the binder is in the form of a finely pulverized solid (for example cement or fly ash) or in the form of small grains (in the case of blast furnace slag for example).
  • the mixture of binder and aggregates is produced at ordinary temperature and the bonds between the grains only appear after a certain time ("setting phenomenon").
  • the composite material When the composite material is too wet, it compacts easily but no longer has a sufficient bearing capacity for the construction machinery to circulate on the layer of materials. In the case of plastic concrete, the material is self-compacting but no longer has any lift.
  • the choice of the water content of a serious cement at the time of its implementation is therefore very important and the material must be neither too dry nor too wet.
  • the water content of the material is generally adjusted at the time of its implementation to a value called "water content of the modified Proctor optimum", this optimum content being designated by W opm .
  • W opm water content of the modified Proctor optimum
  • This optimal value is determined from a laboratory test. In a conventional material based on gravel, the water content W opm is of the order of 6%. When it contains 4 to 5% of water, the mixture is the site of very high friction forces during its compaction; it does not compact well. On the other hand, it provides very good lift vis-à-vis the compactors which leave little trace on the deposited layer.
  • the mixture When it contains around 10% water, the mixture has only the consistency of a fluid concrete which compacts very easily and which is no longer capable of supporting machines, the concrete having the consistency of a mud.
  • the water content W opm represents a compromise between the lift of the mixture and its state of lubrication.
  • the road pavement layers produced according to the methods known from the prior art have a lower part or bottom of the layer whose mechanical characteristics and in particular the fatigue resistance are less than the characteristics mechanical of their upper part, due to the less effective compaction of the bottom layer.
  • the optimal properties of the road layers are not obtained, since the most stressed part of the road layers has the poorest characteristics and in particular the lowest fatigue resistance.
  • the bonding of the successive layers of the roadway is obtained neither satisfactorily nor automatically.
  • the device shown in FIG. 2 allowing the production of road pavement layers from a mixture containing a hydraulic binder is substantially identical to the device shown in Figure 1 used for the production of pavement layers from bituminous mixes.
  • FIGS. 1 and 2 bear the same references, with however the exponent ' as regards the references of the elements in FIG. 2.
  • the device shown in FIG. 2 is constituted by a mobile machine moving on the support 1 ', in the direction of the arrow 2', thanks to tracks 3 '.
  • the chassis of the mobile machine carries a conveyor belt 4 ′ ensuring the transfer towards the rear of the machine, of the material 5 ′ containing the hydraulic binder, intended to constitute the road layer 8 ′.
  • the material spilled at the rear of the chassis of the mobile machine by the conveyor 4 ' is distributed transversely by a screw 6' then adjusted, smoothed and compacted by a finisher table 7 'suspended at the rear of the chassis.
  • a vibrating compactor 10 'moving behind the finisher table completes the compaction.
  • An adjustable deflector 11 ' makes it possible to adjust the angle of discharge of the material 5' at the front of the distribution screw 6 '.
  • the material 5 'reaching the lower part of the layer in progress and intended to constitute the bottom of layer 8'a is kneaded by a screw 12' so as to be intimately mixed with an aqueous liquid brought in by a ramp spray 14 'having a transverse arrangement relative to the chassis of the machine.
  • the aqueous liquid contains a workability additive such as a fluidizer, a plasticizer or a superplasticizer commonly used in the technique of manufacturing concretes.
  • the liquid also contains binder in suspension, this binder can be constituted by cement, fly ash, silica smoke or any other product which can play the role of a hydraulic binder.
  • the liquid is poured out by the ramp 14 'in a proportion adjusted on the one hand according to the quantity of materials intended to constitute the bottom of the layer 8'a, this bottom of the layer being able to have a thickness of between 20 and 50% of the 'total thickness of the road layer 8', on the other hand as a function of the speed of advance of the machine.
  • the addition of a binder in a regulated quantity to the material intended to constitute the base layer makes it possible to increase the mechanical characteristics and in particular the fatigue resistance of this base layer which is the part of the road layer which undergoes the strongest stresses, during the bending in service of the pavement layer.
  • the device used for producing a layer of material containing a hydraulic binder may include a separator of the material flow at the outlet of the conveyor 4 ', into a flow intended to constitute the bottom of the layer and supplying a mixer at the front of the screw 6', in which water is added to the material and a flow, the spreading of which is carried out directly, at the rear of the screw 6 '.
  • a ramp 15 'arranged transversely to the chassis of the mobile machine, below the ramp 14' and at the front of the kneading screw 12 ' makes it possible to spread a liquid on the support 1' just before deposition of material 5 'intended to constitute the layer 8'.
  • the liquid spilled by the spray boom 15 ′ is generally constituted by water which can contain a special additive promoting the bonding of the layer of material deposited on the support.
  • a liquid such as pure water makes it easier to bond the material 5 'to the support 1 by ensuring the presence of a continuous liquid medium between the support 1 and the material 5' deposited on this support.
  • This continuous liquid medium makes it possible to promote the transport of the active binder which can be constituted for example by cement between the layer 8 ′ and the support 1 ′.
  • An additional ramp 18 is placed at the rear of the chassis so as to spray or mist a liquid such as water on the upper surface of the material 5 'being distributed on the support 1' by the screw 6 '.
  • This addition of water sprayed onto the material being spread makes it possible to compensate for the loss of water by evaporation of the material 5 ', in particular in hot weather.
  • the method and the devices according to the invention therefore make it possible to significantly improve the characteristics and in particular the durability of superimposed road layers and of the whole of the road surface produced by superposition of these layers.
  • the devices for producing the road layers can be different from those which have been described and include in particular elements allowing the incorporation of liquid and binder in the material intended to constitute the bottom of the layer, of a type different from those which have been described.
  • this binder can be added directly in solid form to the material intended to constitute the base of the layer instead of being suspended in the lubrication liquid and improving the compactibility of the base. layer.
  • the various liquids used for watering the support, improving the compactibility of the base layer and spraying the mass of materials being spread on the support may contain additives of various compositions intended to improve their effect. .
  • the method according to the invention can be used in particular for the manufacture of pavement layers from a new material containing a filler constituted by bituminous materials recovered from a used pavement during demolition or repair, bound by a hydraulic binder.
  • mills of recovered bituminous material are used which are crushed so as to obtain particles of desired particle size and mixed with a hydraulic binder and with water.
  • the concrete obtained has a very low modulus (10,000 MPa) and a very low tendency to crack due to exceptional deformability at break.
  • the elongation at break of this material is three times that of conventional concrete.
  • the method and the devices according to the invention can be used for producing pavement layers of any kind made up of a material containing a mineral filler and a binder, whether this binder is a bituminous binder or a hydraulic binder .

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Road Paving Structures (AREA)
  • Road Paving Machines (AREA)
  • Road Repair (AREA)
  • Road Signs Or Road Markings (AREA)

Claims (15)

  1. Verfahren zur Herstellung einer Straßenbelagschicht (8, 8') durch Auftragen und Verdichten eines Materials (5, 5'), das durch eine Füllung wie etwa Granulate und ein Bindemittel gebildet wird, im verdichtbaren Zustand auf eine Unterlage (1, 1'), die durch eine zuvor hergestellte untere Schicht gebildet sein kann, dadurch gekennzeichnet, daß man dem Teil des Materials (5, 5'), der zur Bildung des auf die Unterlage aufgetragenen unteren Teils (8a, 8'a) der Belagschicht (8. 8') bestimmt ist, vor seiner Verdichtung eine erste Flüssigkeit zumischt, die in der Lage ist, die Dichtheit der Granulat/Bindemittel-Mischung zu erhöhen.
  2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß man dem Teil des Materials (5, 5'), der zur Bildung des auf die Unterlage aufgetragenen unteren Teils (8a, 8'a) der Belagschicht (8, 8') bestimmt ist, vor seiner Verdichtung außerdem eine zusätzliche Menge an Bindemittel zumischt.
  3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß man auf der Unterlage (1, 1') eine zweite Flüssigkeit verteilt, bevor das Material (5, 5'), das zur Bildung der Straßenbelagschicht (8, 8') bestimmt ist, auf die Unterlage (1, 1') aufgetragen wird.
  4. Verfahren nach irgendeinem der Ansprüche 1 bis 3, dadurch gekenn zeichnet, daß der untere Teil (8a, 8'a) der Belagschicht (8. 8') eine Dicke zwischen 20 und 50 % der Gesamtdicke der Belagschicht (8. 8') hat.
  5. Verfahren nach Anspruch 2, dadurch gekennzeichnet, daß das Material (5), das zur Bildung der Straßenbelagschicht (8) bestimmt ist, ein durch Bitumen gebundenes Material ist und daß die erste Flüssigkeit und die zusätzliche Menge des Bindemittels in der Form einer bituminösen Emulsion in das durch Bitumen gebundene Material (5) eingebracht werden, das dazu bestimmt ist, den unteren Teil (8a) der Belagschicht (8) zu bilden.
  6. Verfahren nach Anspruch 2, dadurch gekennzeichnet, daß das Material (5), das zur Bildung der Straßenbelagschicht (8) bestimmt ist, ein durch Bitumen gebundenes Material ist und daß die erste Flüssigkeit und die zusätzliche Menge des Bindemittels in das durch Bitumen gebundene Material (5) in der Form von in einem Lösungsmittel gelöstem Bitumen eingebracht werden.
  7. Verfahren nach Anspruch 3, dadurch gekennzeichnet, daß das Material (5'), das zur Bildung der Straßenbelagschlcht (8') bestimmt ist, eine Mischung ist, die ein hydraulisches Bindemittel enthält, und daß man auf dem Material (5') im Zuge der Verteilung zur Bildung der Belagschicht (8') eine dritte Flüssigkeit versprüht, um den Feuchtigkeitsgehalt der Belagschicht zu halten.
  8. Verfahren nach Anspruch 2, dadurch gekennzeichnet, daß das zur Bildung der Straßenbelagschicht (8') bestimmte Material (5') eine Mischung ist, die ein hydraulisches Bindemittel enthält, und daß die erste Flüssigkeit und die zusätzliche Menge des Bindemittels in den Teil des Materials (5'), das zur Bildung des unteren Teils (8'a) der Belagschicht (8) bestimmt ist, in der Form einer Suspension von festem Bindemittel in Wasser eingebracht werden.
  9. Verfahren nach Anspruch 7 oder 8, dadurch gekennzeichnet, daß die erste Flüssigkeit einen Handhabungszusatz enthält.
  10. Verfahren nach Anspruch 7, dadurch gekennzeichnet, daß die zweiten und dritten Flüssigkeiten durch Wasser gebildet sind, das geeignete Zusätze enthalten kann.
  11. Verfahren nach irgendeinem der Ansprüche 7 bis 10, dadurch gekenn zeichnet, daß die Mischung (5') Partikel von bituminösem Material einschließt, das von einer gebrauchten Straßendecke zurückgewonnen wurde.
  12. Vorrichtung zur Herstellung einer Straßenbelagschicht durch Auftragen und Verdichten eines Materials (5, 5'), das durch eine Füllung wie etwa Granulate und ein Bindemittel gebildet wird, in verdichtbarem Zustand auf eine Unterlage (1, 1'), welche Vorrichtung gebildet wird durch eine Maschine, die auf der Unterlage (1, 1') in einer Vortriebsrichtung (2, 2') bewegbar ist und einen Förderer (4, 4') für das Material (5, 5') zum hinteren Teil der bewegbaren Maschine, eine Einrichtung (6. 6') zur Querverteilung des von dem Förderer (4, 4') im hinteren Teil der bewegbaren Maschine abgegebenen Materials (5, 5') auf der Unterlage (1. 1') und Mittel (7, 7', 10, 10') zum Verdichten der Belagschicht (8, 8') aus dem auf die Unterlage (1, 1') aufgetragenen Material (5, 5') aufweist, die hinter den Querverteilungsmitteln (6, 6') für das Material (5, 5') angeordnet sind, dadurch gekennzeichnet, daß sie außerdem Mittel (14, 14') zur Zugabe einer ersten Flüssigkeit zu dem Teil des Materials (5. 5'), der zur Bildung des unteren Teils der Belagschicht (8, 8') bestimmt ist, welche Mittel (14, 14') sich vor den genannten Querverteilungsmitteln (6, 6') für das Material (5, 5') befinden, welche erste Flüssigkeit in der Lage ist, die Dichtheit der Granulat/Bindemittel-Mischung zu erhöhen, sowie ein Mittel (12, 12') zum Anmischen der ersten Flüssigkeit und des zur Bildung des unteren Teils (8a, 8'a) der Belagschicht (8, 8') bestimmten Teils des Materials (5, 5') aufweist, welche Anmisch-Mittel (12, 12') zwischen den Mitteln (14. 14') zur Zugabe einer ersten Flüssigkeit und den Verdichtungsmitteln (7, 7', 10. 10') angeordnet sind.
  13. Vorrichtung nach Anspruch 12, dadurch gekennzeichnet, daß sie außerdem ein Mittel (15, 15') zum Verteilen einer zweiten Flüssigkeit auf der Unterlage (1, 1') aufweist, das vor den Anmisch-Mitteln (12, 12') angeordnet ist.
  14. Vorrichtung nach Anspruch 12 oder 13, dadurch gekennzeichnet, daß sie außerdem ein Ablenkorgan (11, 11') zum Führen und Steuern des Ausgieβens des Materials (5, 5') in Richtung auf die Anmisch-Einrichtung (12, 12') ohne Entmischung der Granulate aufweist.
  15. Vorrichtung nach irgendeinem der Ansprüche 12 bis 14, für den Fall, daß das zur Bildung der Straßenbelagschicht (8') bestimmte Material (5) ein Material ist, das ein hydraulisches Bindemittel enthält, dadurch gekennzeich net, daß sie ein Mittel (18) zum Besprengen des Materials (5) mit einer Flüssigkeit wie etwa Wasser im Zuge der Ausbreitung auf der Unterlage (1, 1') aufweist.
EP91402538A 1990-09-25 1991-09-24 Verfahren und Vorrichtung zur Herstellung einer Strassenbelagschicht Expired - Lifetime EP0478441B1 (de)

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FR9011806 1990-09-25
FR9011806A FR2667085B1 (fr) 1990-09-25 1990-09-25 Procede et dispositif de realisation d'une couche d'une chaussee routiere.

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EP0478441A1 EP0478441A1 (de) 1992-04-01
EP0478441B1 true EP0478441B1 (de) 1994-05-18

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FR2732369B1 (fr) * 1995-03-28 1997-06-13 Colas Sa Procede et machine de mise en oeuvre d'une couche d'accrochage et revetement routier comprenant une telle couche
US5895173A (en) * 1996-07-26 1999-04-20 E. D. Etnyre & Co. Roadway paving apparatus
US6805516B2 (en) 2001-06-04 2004-10-19 E.D. Etnyre & Co. Roadway paving system and method including roadway paving vehicle and supply truck
DE102010026744A1 (de) * 2010-07-09 2012-01-12 Kemna Bau Andreae Gmbh & Co Kg Verfahren zur Herstellung einer lärmmindernden Dämpfungsschicht und einer weiteren auf der Dämpfungsschicht angeordneten Schicht für eine Straße
EP3276081B1 (de) * 2016-07-29 2020-03-04 Caterpillar Paving Products Inc. Strassenfertiger mit asphaltrauchrisikoverringerungssystem

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US4073592A (en) * 1976-01-19 1978-02-14 Godberson Harold W Method of paving
FR2508509A1 (fr) * 1981-06-26 1982-12-31 Colas Sa Structure composite pour chaussees et aires de roulement
ATE35296T1 (de) * 1985-09-07 1988-07-15 Schutz Kg Wilhelm Verfahren zur erneuerung von fahrbahndecken.
FR2611766B1 (fr) * 1987-02-24 1989-06-30 Screg Routes & Travaux Dispositif de repandage d'emulsion bitumineuse sur la surface d'une route sans circulation de camions sur la couche d'accrochage realisee par repandage d'emulsion
FR2626593B1 (fr) * 1988-01-29 1992-02-28 Screg Routes & Travaux Procede et dispositif pour la realisation d'un revetement de route

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ES2052345T3 (es) 1994-07-01
ATE105888T1 (de) 1994-06-15
DE69102042D1 (de) 1994-06-23
FR2667085B1 (fr) 1993-08-13
FR2667085A1 (fr) 1992-03-27

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